Size-dependent melting temperature of individual nanometer-sized metallic clusters

Castro, T.; Reifenberger, R.; Choi, E.; Andres, R. P.

doi:10.1103/physrevb.42.8548

Cited by 489 publications

(340 citation statements)

References 32 publications

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“…Internuclear distances of Ag 2 and Ag 2 − have been determined from spectroscopy experiments. 16,17 We use CCSD(T)/aug-ccpVQZ-PP plus core−valence correlation functions (CCSD(T)/ cc-pwCVDZ-PP) method to optimize the lowest-energy isomers of Ag 2 + , Ag 3 , Ag 3 + , Ag 3 − , Ag 4 , as well as other isomers: a D ∞h structure of Ag 3 , a D ∞h structure of Ag 3 + , a D 3h structure of Ag 3 − , and a C 2v structure of Ag 4 . Figure 1 shows the structures of 11 neutral and charged silver clusters used as reference data for geometries.…”

Section: Resultsmentioning

confidence: 99%

Validation of Methods for Computational Catalyst Design: Geometries, Structures, and Energies of Neutral and Charged Silver Clusters

Duanmu

Truhlar

2015

J. Phys. Chem. C

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We report a systematic study of small silver clusters, Ag n , Ag n + , and Ag n − , n = 1−7. We studied all possible isomers of clusters with n = 5−7. We tested 42 exchange−correlation functionals, and we assess these functionals for their accuracy in three respects: geometries (quantitative prediction of internuclear distances), structures (the nature of the lowest-energy structure, for example, whether it is planar or nonplanar), and energies. We find that the ingredients of exchange−correlation functionals are indicators of their success in predicting geometries and structures: local exchange−correlation functionals are generally better than hybrid functionals for geometries; functionals depending on kinetic energy density are the best for predicting the lowest-energy isomer correctly, especially for predicting two-dimensional to threedimenstional transitions correctly. The accuracy for energies is less sensitive to the ingredient list. Our findings could be useful for guiding the selection of methods for computational catalyst design.

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Section: Resultsmentioning

confidence: 99%

Validation of Methods for Computational Catalyst Design: Geometries, Structures, and Energies of Neutral and Charged Silver Clusters

Duanmu

Truhlar

2015

J. Phys. Chem. C

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“…The purified triangles were One must be aware of the fact that the surface energy of the facet of metal nanoparticle is higher than that of bulk metal [28,29]. This means that the movement of surface Au atoms to take the lowest surface energy is more drastic at a nanoparticle surface than at the bulk Au surface through the surface reconstruction as well as formation and disappearance of surface atom islands.…”

Section: Experiments IImentioning

confidence: 99%

Time dependent spectral change upon potential step perturbation for Au nanoparticles immobilized on an organic monolayer-modified ITO electrode

Toyota

Sagara

2006

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Time dependent spectral change of Au nanoparticles immobilized on an ITO electrode upon the change of electrode potential was investigated. Au nanoparticles of a diameter of 11 nm were immobilized on a monolayer of alkylsiloxane with an amine or thiol end group on an ITO electrode.In addition to the previously clarified charging-discharging process of the particles in response to the sine-wave potential modulation at frequencies higher than 8 Hz, very slow relaxation of visible light absorption after a potential step was found in the present work

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“…We believe that this method can be extended to other materials systems grown by the VLS method and, because of the universal nature of size-dependent melting [15,17], can also be used with a variety of catalyst materials. This approach could be one method of generalizing nanowire growth to a variety of substrates and materials.…”

mentioning

confidence: 99%

“…Here we demonstrate a simple and generic approach to VLS growth of ZnO nanowires that utilizes size-dependent melting [15][16][17] of nanometer-scale Au particles (typically ∼ 5 nm diameter) to provide a liquid catalyst without any substrate interaction. We demonstrate this method on both Ti and Mo foil substrates and expect it to be applicable to a variety of nanowire materials, catalysts, and high melting-point substrates.…”

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confidence: 99%

Growth of ZnO nanowires catalyzed by size-dependent melting of Au nanoparticles

Petersen

Likovich

Russell³

et al. 2009

Nanotechnology

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We present a general approach to growing ZnO nanowires on arbitrary, high melting-point (above 970 • C) substrates using the Vapor-Liquid-Solid (VLS) growth mechanism. Our approach utilizes the melting point reduction of sufficiently small (5 nm diameter) Au particles to provide a liquid catalyst without substrate interaction. Using this size-dependent melting effect, we demonstrate catalytic VLS growth of ZnO nanowires on both Ti and Mo foil substrates with aspect ratios in excess of 1000:1. Transmission electron microscopy shows the nanowires to be single-crystalline, and photoluminescence spectra show high-quality optical properties. We believe this growth technique to be widely applicable to a variety of substrates and material systems.

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Size-dependent melting temperature of individual nanometer-sized metallic clusters

Cited by 489 publications

References 32 publications

Validation of Methods for Computational Catalyst Design: Geometries, Structures, and Energies of Neutral and Charged Silver Clusters

Validation of Methods for Computational Catalyst Design: Geometries, Structures, and Energies of Neutral and Charged Silver Clusters

Time dependent spectral change upon potential step perturbation for Au nanoparticles immobilized on an organic monolayer-modified ITO electrode

Growth of ZnO nanowires catalyzed by size-dependent melting of Au nanoparticles

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